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Old 08-04-2015, 06:42 AM
 
3 posts, read 1,929 times
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Hi, I have a Honey Locust that's about 24 years old that for the past 2-3 years starts losing it's leaves little by little beginning in late June. The leaves turn a light green or yellow and drop off. The leaves are still supple - not dried out. I've gotten on an extension ladder and checked the tree out thoroughly and there are no bores or infestation of any kind that I can see. Any ideas as to why it's doing this? Watering problem or a lack of some kind of nutrients?

Thanks in advance for any help you can provide.
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Old 08-04-2015, 07:45 AM
 
Location: PA
51 posts, read 68,729 times
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This might shed some light on the issue: Leaves turning yellow and falling from locust tree

I have Honey Locusts along the street by my house here in PA but I've not noticed the yellowing and dropping yet this year. These trees are about 12 years old.
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Old 08-04-2015, 11:57 AM
 
270 posts, read 374,767 times
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Default Iron?

Quote:
Originally Posted by jim9572 View Post
Hi, I have a Honey Locust that's about 24 years old that for the past 2-3 years starts losing it's leaves little by little beginning in late June. The leaves turn a light green or yellow and drop off. The leaves are still supple - not dried out. I've gotten on an extension ladder and checked the tree out thoroughly and there are no bores or infestation of any kind that I can see. Any ideas as to why it's doing this? Watering problem or a lack of some kind of nutrients?

Thanks in advance for any help you can provide.
I have some river birches that are about 7-8 years old. They were almost all yellow, lots of leaves but all yellow. Usually chlorotic leaves can be a sign of a lack of Iron nutrient. I have put an iron supplement (dry granular) in for 2 years and the trees are now green. Adequate watering is necessary, but if the soil is depleted of iron, the leaves will still be unhealthy looking.

The iron supplement is not expensive, so trying it won't cost an arm or a leg.
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Old 08-04-2015, 03:23 PM
 
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Thanks Carl, I'll give the iron a try.
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Old 08-06-2015, 12:08 PM
 
695 posts, read 687,467 times
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My honey locust did exactly the same thing, didn't drop leaves, but the leaves at the ends of the branches turned yellow, healthy, but yellow.

Now they are back to green. All I did was give it a slow soak 1x a week for two weeks. Not sure if that is what helped, may have been something else that I am unaware of.

I also have two river birch, one in the front that was put in 1.5 months ago, one in the back was put in just 2 weeks ago. Both went through a bit of "shock", a few leaves turned yellow, then brown tips, then dropped. The nursery told me that if the leaves drop when yellow, without turning brown at the tips, it's a lack of iron, if they turn yellow, then brown, it's a lack of water.

Did the same thing as I did for the Locust, a slow soak for several hours 1x since planting, leaves are now fine.

Hope your locust is doing well now.
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Old 08-10-2015, 12:14 PM
 
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Thanks...I have put some iron all around the roots and we'll see how that works. Thanks to all for the thoughts / tips.
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